Ncree intro

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National Center for Research on Earthquake Engineering (NCREE), Taiwan, R.O.C._2011

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Ncree intro

  1. 1. Introduction of National Center for Research on Earthquake Engineering (NCREE) Prof. Kuo-Chun Chang Director, NCREEProfessor, National Taiwan University, Taipei, Taiwan December 6, 2010 1
  2. 2. Seismicity in Taiwan (1900-2009) Tectonics of Taiwan Earthquake Distribution of Taiwan (A.D.1900-2009)2
  3. 3. 1999 Chi-Chi Earthquake Ml=7.3 Sept. 21, 1999 Vertical Rupture = 9.0m Taipei County Tai-Chung County3
  4. 4. Evolution of NCREE Project awarded by NSC to NTU in 1990 Merged into NARL as one of the Centers in 2003 Directorship , Prof. K.C. Chang(2010- Present) Prof. K.C. Tsai(2003- 2010) Prof. C.H. Loh(1997-2003) Prof. C.S. Yeh(1990-1997) Major experimental facilities have been in operation since 1997 when the construction of the lab was completed4
  5. 5. Vision and Mission Pre-quake preparation, emergency response and post-quake recovery Integrate research capacities of various earthquake engineering research institutes in Taiwan to enhance the research capability of the nation Promote international research cooperation for earthquake hazard mitigation, and play a key role in the earthquake engineering research community of the world5
  6. 6. Vision - Recoverable and Sustainable Communities Seismic Design, Fast recovery Evaluation and Retrofit New Materials, Structures and Hazard Prediction Novel Technologies and Risk Assessment Safe and Operational Assistance and Monitoring, Early Safe and Recovery from Warning and Usable Disaster Fast Assessment6
  7. 7. Medium-term: Enhancing Community Resilience Fast Assistance and Recovery Procedure Targets Cost Effective Technologies for Seismic Accurately Earthly Warning System and Design, Evaluation and Retrofit General Buildings (Low, Medium and High Rise Building etc.) Important Structures (Hi-tech factory, dangerous goods Storehouse, harbor etc.) Rescue and Emergency Facilities (Hospital, School, Police and fire station etc.) Lifeline Utilities (Tap-water, Fuel Gas, Electric Power, Communication, and Traffic etc.)7 Improving Seismic Resistance of Specific Structures
  8. 8. Personnel (2010) A total of 106 employees 23 others 30 PhD 22% 28% 53 MS 50%8
  9. 9. Revenue in 2009 (9.58 million US dollars for 2009) 民間委託計畫 政府委託計畫/ US 472 個案服務收入 thousand US 1,549 4.9% thousand 16.2% 公務預算 US 7,560 thousand 78.9% (7.56 million US dollars from NSC)9
  10. 10. Experimental Facilities L-shape reaction wall (15m+12m+9m+6m in height) 15m St ro ng f lo or 5mx5m 3D10 Earthquake simulator
  11. 11. Experimental Facilities Multi-Axial Testing System (MATS) 4000ton ±1.2m Strong Floor11
  12. 12. Shaking Table Tests12
  13. 13. Reaction Wall Tests - Full Scale Structural Element Tests World-Largest BRB Test13
  14. 14. Contribution to Evolution of Seismic Design Codes Building structures Highway bridges Seismic isolation and energy dissipation design Railway bridges Qualification for seismic isolation and energy dissipation devices14
  15. 15. Seismic Evaluation and Retrofit of School Buildings Strategy was proposed. Methods for simple survey, preliminary evaluation, detailed evaluation and retrofit design were developed. Handbook was published. Workshops were held for engineers and school administrations. In Situ Pushover Test 2000 RFL Displacement - Base Shear Without Retrofit With Retrofit 1600 Base Shear (kN) 1200 800 400 0 0 100 200 300 RFL Displacement (mm) 400 500 In Situ Laboratory Pseudo Dynamic Test Full Scale Cyclic Test Effectiveness of Retrofit15
  16. 16. Project on Seismic Upgrading for Buildings of Elementary and Secondary Schools Project was approved by the Legislation Yuan as part of economy stimulus to expand investment in public works in response to financial tsunami. NT$18.3 billion was allocated for seismic upgrading of elementary and secondary school buildings. 1,500 school buildings will have been retrofitted in four years, from 2009 to 2012. In order to conduct the project systematically and effectively, NCREE was entrusted by the Ministry of Education to establish a special office to offer support on administration and technology. Data base was set up to support decision making. Specification was drafted to standardize operation procedures. Training courses were held for dissemination.16
  17. 17. In Situ Experiment on Seismic Performance of School Buildings17
  18. 18. 20100304 Jia-Xian Earthquake Location of Yu- Jing Junior High School (Grades 7-9) and Yu-Jing Vocational School (Grades 10-12) Distance between two schools 1.2 km Yu-Jing Junior High School (PGA:184gal) 30 km from Yu-Jing location epicenter school (PGA:168gal) from 31 km from epicenter Epicenter18
  19. 19. 20100304 Damages of School Building in Jia-Xian Earthquake After the earthquake, three reconnaissance teams were sent to the disaster area. Yu-Jing Junior High School and Yu-Jimg Vocational School were about 30 km from the epicenter. The distance between the two schools is about 1 km. Three buildings without retrofit in Yu-Jing Junior High School were found seriously damaged. No damage was observed in the buildings with retrofit in Yu-Jing Vocational School.19 Yu-Jinh Junior High School Yu-Jinh Junior High School
  20. 20. Taiwan Earthquake Loss Estimation System (1/2) Complete loss assessment within short time after receiving mail from CWB and automatically send messages to emergency response persons to assist in initiation and management of CEOC20
  21. 21. Taiwan Earthquake Loss Estimation System (2/2) Early seismic loss estimation improves the efficiency of emergency responses Seismic disaster simulations provides useful data (PME, rescue & medical resources, etc.) for disaster reduction plans Probabilistic seismic risk assessment has been applied in TREIF-ERA to study insurance policy and to update risk measures Risk assessment of highway bridges has been applied in prioritization of retrofit sequence of bridges of DGH, MOTC21
  22. 22. Bridge Multiple Hazard Monitoring System Multiple hazards, especially earthquake and flooding scour, must be properly considered and constant monitored for crucial bridges. Scour failures tend to occur suddenly and without warning. Hydraulic scouring is one of the major factors for bridge failure. Bridges that are subject to periodic flooding should be monitored during high-flow seasons for the safety of the public. NCREE has been focused on this bridge scouring problems and developed a series multiple hazards monitoring systems using the wireless sensor network technology. The performance of the resistance characteristics of a pier under the condition of a torrential flood or earthquake can then be monitored in real-time, whenever it happens. Wireless sensor networks using the Wu River / Da Du Bridge, Taichung, Taiwan Zigbee protocol provide real-time information will be of significant help to bridge authorities for both bridge operation and maintenance under - natural disaster conditions.P13 P10 P9 開始沖刷 淤積 P12 P11 沖刷 流速快 流速 慢 5c m 開始沖刷 淤積 8 7 6 沖 刷 深 度 (m) 5 4 0 3 1 2 2 3 4 1 5 6 0 7 8 2 樁承載力控制 3 樁軀體彎矩控制 水 樁軀體剪力控制 流 4 25 30 土壤剪力控制 流 20 15 速 5 10 5 (m (m) 水 位 高 /s ec ) 水 位 計 流 速 計22
  23. 23. Precast segmental post-tensioned concrete bridge columns Taichung Area Expressway No .4 Reduce environmental impact and traffic disruption; applied to Taichung Area Expressway No. 4. Tests of columns with lead-rubber seismic isolation bearings Tests of columns with high performance steel energy dissipation bars23 Installation of column cap
  24. 24. Effect of Rocking on the Seismic Performance of Pier with Spread Footing Improve the regulation related to footing size in the seismic design code for bridges drift (%) drift (%) -8 -6 -4 -2 0 2 4 6 8 drift (%) -8 -6 -4 -2 0 2 4 6 8 -8 -6 -4 -2 0 2 4 6 8 200 200 V2C=166kN 200 V2C=134kN CD30FB-F V2C=166kN CD30FB-R CD30FS-RV2C=134kN Lateral force (kN) 100 Lateral force (kN) Lateral force (kN) 100 100 0 0 0 Mr -100 -100 -100 WT P-D curve -200 -200 -200 α -200 -100 0 100 200 -200 -100 0 100 200 lateral displacement (mm) -200 -100 0 100 200 lateral displacement (mm) lateral displacement (mm) qu B= ∞ cm B=170cm B=140cm B 500 500 500 400 400 400 CD30FB-F CD30FB-R CD30FS-R 300 300 M 2C 300 Moment (kN-m) Moment (kN-m) Moment (kN-m) 200 200 200 100 100 =414kN-m 100 0 0 0 -100 -100 -100 -200 -200 -200 -300 M-θ curve -300 -300 -400 -400 -400 -500 -500 -500 -0.08-0.06-0.04-0.02 0 0.02 0.04 0.06 0.08 -0.08-0.06-0.04-0.02 0 0.02 0.04 0.06 0.08 -0.08-0.06-0.04-0.02 0 0.02 0.04 0.06 0.0824 Rotation (radian) Rotation (radian) Rotation (radian)
  25. 25. Drift ratio (%) In Situ Experiment on Seismic 1250 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 125 Performance of Niu-Tou Bridges 1000 750 P3 COLUMN 100 75 500 50 Lateral Force (kN) Laterl force (tonf) 250 25 PULL PUSH NCREE coordinated 0 0 -250 -25 professors and -500 -50 researchers from NTU, -750 -75 NCTU, NCU, NTUT, and -1000 -100 YUNTECH to executive -1250 -600 -500 -400 -300 -200 -100 0 100 200 300 400 500 600 -125 Lateral Displacement (mm) the interdisciplinary research. This is the first case about in situ experiment on seismic performance of bridges in the world. The research results will be provided for the Ministry of Transportation and Communication (MOTC) to review the seismic design codes for25 bridges.
  26. 26. Buckling Restrained Brace Taichung City Government Building More than 10000 pieces of  Double‐Core BRBs have  been used in Seismic  retrofit and new  construction projects in  Taiwan. Slotted Buckling Restrained Brace Double-Core BRBs Slotted BRB Patent Pending: Canada Korea China Taiwan Italy U.S.A.26 Japan
  27. 27. PISA3D Development and ApplicationsHas been certified and applied in practical engineering E-Defense Blind Analysis Contest 2009 The numerical prediction of 5-story frame 2nd place winner in 3-D category, steel damper 3rd place winner in 3-D category, viscous damper 3rd place winner in 2-D category, steel damper Detailed Seismic Evaluation of Existing School Buildings Practical applications27
  28. 28. Shaking Table Test and Numerical analysis of the Medical Equipment Fixed on the Light-Weight partition Wall 300 280 Support Loading (kg) 250 202.65 200 Dynamic test Static test 150 113.4 100 68 68 50 0 CNS Steel sheet Light concrete reinf orcement Test samples Experiment Devices The Results of Static and Dynamic Experiments Block Shear Failure Tension Failure Bending FailurePunching Shear Failure Handrail Device Crib Equipment States of Failure for Hand-Washing28 The Light Partition Board Equipment
  29. 29. On-site Earthquake Early Warning System Sensor Campus-type EEWS Demonstration Station On-site EEWS Taipei, Fanghe J.H.S. / Yilan, Yilan E.S. Filter Trigger BW NN Seismic sensor On-line EEW Earthquake Warning calculation System Earthquake Warning Automatic Warning Control MessageAutomatic Control ChiChi EQ. / Taichung / 50 km EEW / Intensity: 5 5 2 4 Intensity: 5 1 4 EQ Trigger 3 6 3 4 EQ Trigger: 27.9s 5 2 Acc.>40gal 1 ChiChi EQ. / Hsinchu / 105 km EEW / Intensity: 4 1. Message broadcast 1. EEW message switch to TV 6 2. LED message Display 2. Automatically cut off the gas Intensity: 5 3. Automatically door opening 3. Evacuation instructions EQ Trigger 4. Evacuation instructions 4. Emergency lightening switch 5. Emergency lightening switch 5. Emergency power switch EQ Trigger: 6.29 Automatic Bookshelf Stopper 6. Emergency park the elevator to the closest floor 32.6s Acc.>40gal
  30. 30. Geological Survey of Strong Motion Stations NCREE and CWB are cooperating in the drilling project. 469 stations have been surveyed, and 22 of them have depths greater than 50m. Those results were bulletined in the website below. http://geo.ncree.org.tw/30
  31. 31. High Technology Science Parks Earthquake Monitoring and Site Effect Study NCREE Broadband Seismic Network Science Parks Site Effect Hsing-Chu Tainan31
  32. 32. Soil Gas Monitoring Distribution of soil-gas survey in Ilan Plain ,about 160 samples were collected and analyzed. Physical model of Taiwan dividing it into two tectonic zones (red and green circles), whereas dashed area is the common tectonic zone.32
  33. 33. Studies on Model Pile in Saturated Sand Lateral load test Shaking table test 20 Pile Free Field 16 Amplification factor 12 8 4 0 0 2 4 6 8 10 12 14 16 18 20 Frequency (Hz)33 Nonlinear p-y relation Inertia and kinematic effect on pile Amplification factor vs. frequency (Dr = 65.4 %)
  34. 34. Introducing and Demonstrating Earthquake Engineering Research in Schools (IDEERS) IDEERSEducational programs for high school,undergraduate and graduate students34
  35. 35. International Training Program (ITP) for Seismic Design of Structures 50 People 40 CountryNumber 30 20 10 0 2002 2003 2004 2005 2006 2007 2008 2009 Year35
  36. 36. Building a Safe Homeland— Introduction to Earthquake Engineering36
  37. 37. Thank you for your attendance 37

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